/************************************************** Perl-Compatible Regular Expressions **************************************************//* PCRE is a library of functions to support regular expressions whose syntaxand semantics are as close as possible to those of the Perl 5 language. Written by Philip Hazel Copyright (c) 1997-2013 University of Cambridge-----------------------------------------------------------------------------Redistribution and use in source and binary forms, with or withoutmodification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the University of Cambridge nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THEIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSEARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BELIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, ORCONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OFSUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESSINTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER INCONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THEPOSSIBILITY OF SUCH DAMAGE.-----------------------------------------------------------------------------*//* This module contains an internal function that is used to match an extendedclass. It is used by both pcre_exec() and pcre_def_exec(). */#ifdef HAVE_CONFIG_H#include"config.h"#endif#include"pcre_internal.h"/************************************************** Match character against an XCLASS **************************************************//* This function is called to match a character against an extended class thatmight contain values > 255 and/or Unicode properties.Arguments: c the character data points to the flag byte of the XCLASS dataReturns: TRUE if character matches, else FALSE*/BOOLPRIV(xclass)(pcre_uint32c,constpcre_uchar*data,BOOLutf){pcre_uchart;BOOLnegated=(*data&XCL_NOT)!=0;(void)utf;#ifdef COMPILE_PCRE8/* In 8 bit mode, this must always be TRUE. Help the compiler to know that. */utf=TRUE;#endif/* Character values < 256 are matched against a bitmap, if one is present. Ifnot, we still carry on, because there may be ranges that start below 256 in theadditional data. */if(c<256){if((*data&XCL_HASPROP)==0){if((*data&XCL_MAP)==0)returnnegated;return(((pcre_uint8*)(data+1))[c/8]&(1<<(c&7)))!=0;}if((*data&XCL_MAP)!=0&&(((pcre_uint8*)(data+1))[c/8]&(1<<(c&7)))!=0)return!negated;/* char found */}/* First skip the bit map if present. Then match against the list of Unicodeproperties or large chars or ranges that end with a large char. We won't everencounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */if((*data++&XCL_MAP)!=0)data+=32/sizeof(pcre_uchar);while((t=*data++)!=XCL_END){pcre_uint32x,y;if(t==XCL_SINGLE){#ifdef SUPPORT_UTFif(utf){GETCHARINC(x,data);/* macro generates multiple statements */}else#endifx=*data++;if(c==x)return!negated;}elseif(t==XCL_RANGE){#ifdef SUPPORT_UTFif(utf){GETCHARINC(x,data);/* macro generates multiple statements */GETCHARINC(y,data);/* macro generates multiple statements */}else#endif{x=*data++;y=*data++;}if(c>=x&&c<=y)return!negated;}#ifdef SUPPORT_UCPelse/* XCL_PROP & XCL_NOTPROP */{constucd_record*prop=GET_UCD(c);BOOLisprop=t==XCL_PROP;switch(*data){casePT_ANY:if(isprop)return!negated;break;casePT_LAMP:if((prop->chartype==ucp_Lu||prop->chartype==ucp_Ll||prop->chartype==ucp_Lt)==isprop)return!negated;break;casePT_GC:if((data[1]==PRIV(ucp_gentype)[prop->chartype])==isprop)return!negated;break;casePT_PC:if((data[1]==prop->chartype)==isprop)return!negated;break;casePT_SC:if((data[1]==prop->script)==isprop)return!negated;break;casePT_ALNUM:if((PRIV(ucp_gentype)[prop->chartype]==ucp_L||PRIV(ucp_gentype)[prop->chartype]==ucp_N)==isprop)return!negated;break;/* Perl space used to exclude VT, but from Perl 5.18 it is included, which means that Perl space and POSIX space are now identical. PCRE was changed at release 8.34. */casePT_SPACE:/* Perl space */casePT_PXSPACE:/* POSIX space */switch(c){HSPACE_CASES:VSPACE_CASES:if(isprop)return!negated;break;default:if((PRIV(ucp_gentype)[prop->chartype]==ucp_Z)==isprop)return!negated;break;}break;casePT_WORD:if((PRIV(ucp_gentype)[prop->chartype]==ucp_L||PRIV(ucp_gentype)[prop->chartype]==ucp_N||c==CHAR_UNDERSCORE)==isprop)return!negated;break;casePT_UCNC:if(c<0xa0){if((c==CHAR_DOLLAR_SIGN||c==CHAR_COMMERCIAL_AT||c==CHAR_GRAVE_ACCENT)==isprop)return!negated;}else{if((c<0xd800||c>0xdfff)==isprop)return!negated;}break;/* The following three properties can occur only in an XCLASS, as there is no \p or \P coding for them. *//* Graphic character. Implement this as not Z (space or separator) and not C (other), except for Cf (format) with a few exceptions. This seems to be what Perl does. The exceptional characters are: U+061C Arabic Letter Mark U+180E Mongolian Vowel Separator U+2066 - U+2069 Various "isolate"s */casePT_PXGRAPH:if((PRIV(ucp_gentype)[prop->chartype]!=ucp_Z&&(PRIV(ucp_gentype)[prop->chartype]!=ucp_C||(prop->chartype==ucp_Cf&&c!=0x061c&&c!=0x180e&&(c<0x2066||c>0x2069))))==isprop)return!negated;break;/* Printable character: same as graphic, with the addition of Zs, i.e. not Zl and not Zp, and U+180E. */casePT_PXPRINT:if((prop->chartype!=ucp_Zl&&prop->chartype!=ucp_Zp&&(PRIV(ucp_gentype)[prop->chartype]!=ucp_C||(prop->chartype==ucp_Cf&&c!=0x061c&&(c<0x2066||c>0x2069))))==isprop)return!negated;break;/* Punctuation: all Unicode punctuation, plus ASCII characters that Unicode treats as symbols rather than punctuation, for Perl compatibility (these are $+<=>^`|~). */casePT_PXPUNCT:if((PRIV(ucp_gentype)[prop->chartype]==ucp_P||(c<128&&PRIV(ucp_gentype)[prop->chartype]==ucp_S))==isprop)return!negated;break;/* This should never occur, but compilers may mutter if there is no default. */default:returnFALSE;}data+=2;}#endif /* SUPPORT_UCP */}returnnegated;/* char did not match */}/* End of pcre_xclass.c */